Soon I expect to be jamming with a guitarist from work. I'm looking for a light easy to carry amp, something between my Microbass and WM15. I have to negotiate a lot of stairs each trip and the WM15 is just too bulky,and the Peavey too wimpy. The guitarist is using a 15W Fender Frontman. We'll be playing rock and some blues. My initial thought is a WM10 but I'd welcome other opinions. I'd like to keep it under $500. Oh, and did I mention it has to be easy to carry. Thanks!